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Finding the Fourth Proportional to 1,953.16, 2,928.24 and 979.92

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Solution

The fourth proportional to 1,953.16, 2,928.24 and 979.92 is: 1,469.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,953.16 : 2,928.24 = 979.92 : x
  2. Step 2: Convert to fraction form
    1,953.16/2,928.24 = 979.92/x
  3. Step 3: Cross multiply
    1,953.16x = 2,928.24 × 979.92
  4. Step 4: Simplify right side
    1,953.16x = 2,869,440.94
  5. Step 5: Solve for x
    x = 2,869,440.94/1,953.16
  6. Step 6: Final answer
    x = 1,469.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.